The number 18070
18070 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 13 × 139. Divisors (16): 1, 2, 5, 10, 13, 26, 65, 130, 139, 278, 695, 1390, 1807, 3614, 9035, 18070.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18070 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18070 is composite. Its prime factorisation is
- 3
The divisors add up to 35280; without 18070 itself that is 17210, so 18070 is deficient (17210 is less than 18070). Euler's totient φ(18070) = 6624 numbers up to 18070 share no factor with it.
- 4
The digits of 18070 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18070 = 2 \times 5 \times 13 \times 139 \]
18070 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 35280 |
| Euler totient φ(n) | 6624 |
| Square | 326524900 |
| Cube | 5900304943000 |
| Square root | 134.424700 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 40 |
| Scientific notation | 1.807 × |
18070 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand and seventy |
| Binary (base 2) | 100011010010110 |
| Octal (base 8) | 43226 |
| Hexadecimal (base 16) | 4696 |
| Base 3 | 220210021 |
| As time | 18070 seconds = 5 h 1 min 10 s |
Is 18070 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18070 ÷ 2 = 9035) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (18070 ÷ 5 = 3614) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (18070 ÷ 10 = 1807) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18070 a prime number?
No. 18070 = 2 × 5 × 13 × 139, so it is divisible by 2.
What are the factors of 18070?
1, 2, 5, 10, 13, 26, 65, 130, 139, 278, 695, 1390, 1807, 3614, 9035, 18070.
What is 18070 in binary?
100011010010110 (hexadecimal 4696, octal 43226).
What is the square root of 18070?
About 134.4247.
Is 18070 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 18070?
It is a composite number with 16 divisors.